This standard BS 2842:1992 Specification for whirling hygrometer is classified in these ICS categories:
17.200.20 Temperature-measuring instruments
This British Standard specifies requirements for thermometers suitable for use in whirling (sling) hygrometers, together with sufficient details of the other parts of the instrument to ensure that the thermometers are interchangeable in the frames.
Requirements for thermometers suitable for use in whirling (sling) hygrometers and requirements for the frame.